Question about 1998 Toyota Camry

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My check engine light came on and the code came up as EGR Valve flow restricted. How can I fix that? Thank you.

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Try to see if hoses are clogged if not replace egr valve.

Posted on Sep 13, 2010

  • c_oxentine Sep 13, 2010

    Not sure where those are located on this car at all.

  • steven spiegel Sep 13, 2010

    You should get a chiltons manual for the year and make of your vehicle if you plan on doing any small repairs and keeping the car for any lenth of time.that will locate the egr valve and the hoses will be located in the manual also. Im not sure if there are any sites that show diagrams for vehicles or not but if so you could also do that.

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1 Answer

Check engine light comes code p1401


Hi Abe, I'm glad to help!

P1401 is an EGR fault code: Differential Pressure Feedback EGR Circuit High Input. This can be caused by several things. EGR Valve is bad, Flow through the valve is restricted due to carbon build-up. Electrical connector OR wiring is damaged somewhere. Check the wiring and the connector at the EGR valve if no damage is found then replace the EGR valve and clean the port holes in the engine and the EGR tube that's running to the valve "IF IT HAS ONE". Clear the codes and drive it and see what happens. Hope this helps and have an awesome day Abe.

May 17, 2013 | Mercury Villager Cars & Trucks

1 Answer

96 cutlass supreme will not pass emission in ut. what should I do? KOER failed, trouble code po401


cleanout egr valve and troutle body . Or replace egr with new one, clean, check vacumm lines , check for clogged check , depending on modle of car you can pippoint problem as some have a common part problem depeding with make of car. But all have to do with exaust system. Insufficient flow exaust flow. Im not an expert, all I know it is related to this, I have it myself so im googling it.

Ford EGR valve

The OBDII fault code P0401 means that the engine computer has detected that the Exhaust Gas Recirculation (EGR) system flow is insufficient. Read more how the EGR system works below. What could cause the code P0401 - clogged or restricted EGR passages
- faulty EGR valve
- EGR valve stuck closed
- problems with the DPFE sensor (Ford)
- problems with hoses to the DPFE sensor (Ford)
- problem with the EGR vacuum switching valve (Toyota)
- clogged catalytic converter
- carboned up EGR temperature sensor
- vacuum supply issues at the vacuum-operated EGR valve
- electrical problems with the EGR valve control circuit
- engine computer problems
helpful website helps you with pinpoint and sou;ution related to auto make and model shows you most common cause of code reading.
www.samarins.com

Apr 16, 2013 | Cars & Trucks

4 Answers

Grand carvan gives p402 code


This is not a cut and dry fault code. This means that more than one thing wrong can set the code in the computers memory. Here is the low down on the P0402 fault code. This is from the OBD2 fault code diagnostic book.

P0402 - Exhaust Gas Recirculation Flow Excessive Detected
Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Possible engine hesitation
Possible causes - EGR solenoid valve harness is open or shorted
- EGR solenoid valve circuit poor electrical connection
- EGR volume control valve stuck closed
- Dead (Weak) battery
- Faulty EGR temperature sensor and circuit
- Faulty EGR Valve
- EGR passage clogged
- Exhaust gas leaks

Jan 18, 2012 | Cars & Trucks

1 Answer

PO400 check engine light is on seems to run normal what to do?


P0400 - Exhaust Gas Recirculation Flow Malfunction
The exhaust gas recirculation (EGR) valve is vacuum controlled valve that regulates the amount of exhaust gases that re-enter the cylinders. The powertrain control module (PCM) determines how much based on engine load, temp, and other conditions. If the PCM detects that the amount of exhaust gases entering the cylinder were insufficient or non-existent, this code is set.

No symptoms will likely be noticed by the driver other than the MIL (malfunction indicator lamp). However, non visible symptoms will be increased combustion temperature and increased Nox emissions. A code P0400 may mean that one or more of the following has happened:
- Plugged EGR passage which restricts the flow of exhaust gasses
- Faulty EGR solenoid
- Faulty EGR solenoid wiring/harness
- Vacuum lines damaged/disconnected to the EGR valve solenoid or to the EGR valve
- Faulty EGR valve

Check it and keep us updated.

Oct 07, 2011 | 1997 Mercury Villager

1 Answer

I have the engine check light on my 2001 Hyundai XG 300. The codes I brought up with the OBD2 reader were P0100 P0115 P0120 P1600 What would you suggest is the problem and fix on this I also...


Welcome to FIxYa.com
Description of codes are:
P01600 - Serial cable malfunction-- check connection,
Po115-Coolant sensor-indicates a open or short-circuit in the engine coolant temperature sensor circuit.

The P0401 code is Insufficient Flow Exhaust Gas Recirculation System.

The code is set when the engien computer detects less than the requested amount of EGR flow when the engine is hot and is under load.

What usually sets the code is an inoperative EGR valve, or a carbon clogged port under the EGR valve.

On your engine, the EGR valve is vacuum operated, and there is a little computer-controlled EGR solenodi valve in the vacuum hose that detemines how much vacuum the EGR valve gets. If this solenoid is bad, or there is a vacuum leak in one of the hoses, the EGR valve won't open when it should setting the code.

Since the dealer already cleaned the EGR valve tube, I would suspect your problem is likely due to a bad EGR solenoid valve or a leaky vacuum hose to the EGR valve.


Here is the EGR solenoid valve part number and list price:

P/N 3946038750 $40.59



I would clear the codes first and run engine for two min and re-check codes.



Write to me of the findings and we will go from there.





Regards, Lee Davidian


A Four Thumbs up ^^^^ is appreciated for answering your question.

Thank you, Lee Davidian

Oct 19, 2010 | 2001 Hyundai XG300

2 Answers

EGR Valve pintle intermittently sticking or not opening


possible but the code refers to the valve and or the solenoid to operate the valve
could be a loose / broken wire or bad ground connection
if it is that bad , replace the egr unit complete

Apr 19, 2017 | 1997 GMC Sierra

1 Answer

1999 plynouth grand voyager was coding egr replace


just because the check engine light is back on, it doesn't necessarily mean it is for the same problem. it could be, but would need to pull codes again to find out what its for. literally hundreds of different codes could turn on check engine light. also, was original code for "insufficient egr flow" or "excessive egr flow"? it makes a difference.

Feb 21, 2010 | 1999 Plymouth Grand Voyager

1 Answer

I replaced the egr valve and the check engine light is still on so what do I do the code still says p0401


When you replaced the EGR valve did you check the EGR passage to make sure it wasn't clogged. Since exhaust gasses flow through the EGR passage carbon builds up on the walls restricting flow which can eventually lead to the code p0401 Insufficient EGR flow.

Jan 10, 2010 | 2001 Chevrolet Monte Carlo

1 Answer

I just bought a 1997 Mercury Sable it was a private sale. Once I got it home the check engine light was on can't remember the code but it when I looked it up it was the canister purge valve. Spent $80. for...


P0401 insufficient EGR flow.

Possible causes:
  • Fault in vacuum supply to EGR vacuum regulator solenoid.
  • EGR valve stuck closed or iced.
  • EGR valve diaphragm leaks.
  • EGR valve or flow path restricted.
  • EGR vacuum hose off, plugged or leaks.
  • VPWR circuit open to EGR Vacuum Regulator solenoid.
  • EVR circuit to PCM open.
  • EVR circuit to PCM shorted to PWR.
  • Differential Pressure Feedback EGR (D.P.F. EGR) sensor pressure hoses both connected improperly.
  • D.P.F. EGR sensor pressure hoses reversed.
  • D.P.F. EGR sensor VREF circuit open.
  • Downstream pressure hose off.
  • Downstream pressure hose plugged.
  • Damaged orifice tube assembly.
  • Damaged EGR Vacuum Regulator solenoid.
  • Damaged D.P.F. EGR sensor.
  • Damaged PCM.



P0443 indicates an intermittent EVAP canister purge valve circuit failure.
Possible causes:
  • Intermittent EVAP canister purge valve or VPWR circuit open.
  • Damaged EVAP canister purge valve.

Mar 13, 2009 | 1997 Mercury Sable

1 Answer

I am having trouble getting my check light to go off after I had it checked and the EGR valve was replaced. The light comes back on after about 15 miles of driving and the code reads EGR poor flow. I can...


Insufficient EGR Flow Detected

Possible Causes:
DPFE sensor signal circuit is shorted to ground
DPFE sensor VREF circuit is open between sensor and PCM
DPFE sensor downstream hose off or plugged
DPFE sensor hoses both off, loose or damaged
DPFE sensor hoses connected wrong (reversed)
EGR orifice tube is damaged or restricted
PCM has failed
And what sets the code is…….Engine started, engine running in closed loop under steady cruise conditions, and the PCM detected the DPFE sensor input indicated insufficient EGR gas flow. Run the KOER Self-Test, and if DTC P1408 is present, the fault is currently present. This code sets in 2 Trip(s). The light will stay on until the cause is repaired. A bad EGR valve is only on possible cause.

Hope this helps,

Dave

Feb 28, 2009 | 2002 Ford Mustang

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